<template>
  <a-layout>

    <a-layout-content
        :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
    >
      <p>

        <a-form
            layout="inline"
            :model="param"
        >
          <a-form-item>
            <a-input v-model:value="param.name" placeholder="名称">
            </a-input>
          </a-form-item>
          <a-form-item>
            <a-button type="primary" @click="handleQuery({page: 1, size: pagination.pageSize})">查询</a-button>
          </a-form-item>
          <a-form-item>
            <a-button type="primary" @click="add()">新增</a-button>
          </a-form-item>
        </a-form>


      </p>
      <a-table
          :columns="columns"
          :data-source="ebooks"
          :row-key="record => record.id"
          :pagination="pagination"
          :loading="loading"
          @change="handleTableChange"
      >
        <template #cover="{ text:cover }">
          <img v-if="cover" :src="cover" alt="avatar" />
        </template>

        <template v-slot:category="{ text, record}">
          <span>{{getCategoryName(record.category1Id)}} / {{getCategoryName(record.category2Id)}}</span>
        </template>

        <template v-slot:action="{ text,record }">
          <a-space>
            <router-link :to="'/admin/doc?ebookId=' + record.id">
              <a-button type="primary">文档管理</a-button>
            </router-link>
            <a-button type="primary" @click="edit(record)">编辑</a-button>
            <a-popconfirm
                title="删除后无法恢复，是否确认删除?"
                ok-text="是"
                cancel-text="否"
                @confirm="handleDelete(record.id)"
            >
              <a-button type="danger"  >删除</a-button>
            </a-popconfirm>

          </a-space>
        </template>
      </a-table>
    </a-layout-content>
  </a-layout>

  <a-modal
      title="电子书表单"
      v-model:visible="modalVisible"
      :confirm-loading="modalLoading"
      @ok="handleModalOk"
  >
    <a-form :model="ebook" :label-col="{ span: 6 }" :wrapper-col="{ span: 18 }">
      <a-form-item label="封面">
        <a-input v-model:value="ebook.cover" />
      </a-form-item>
      <a-form-item label="名称">
        <a-input v-model:value="ebook.name" />
      </a-form-item>
      <a-form-item label="分类">
        <a-cascader v-model:value="categoryIds" :options="level1" :field-names="{ label: 'name', value: 'id', children: 'children' }" placeholder="请选择分类" />
      </a-form-item>
      <a-form-item label="描述">
        <a-input v-model:value="ebook.description" type="textarea" />
      </a-form-item>
    </a-form>
  </a-modal>

</template>

<script lang="ts">
import { defineComponent, onMounted, ref } from 'vue';
import axios from 'axios';
import { message } from 'ant-design-vue';
import {Tool} from "@/util/tool";

export default defineComponent({
  name: 'AdminEbook',
  setup() {
    // 定义响应式变量param
    const param = ref();
    // 初始给它一个空变量，否则会报错
    param.value = {};
    const ebooks = ref();
    const pagination = ref({
      current: 1,
      pageSize: 4,
      total: 0
    });
    const loading = ref(false);

    const columns = [
      {
        title: '封面',
        dataIndex: 'cover',
        slots: {customRender: 'cover'}
      },
      {
        title: '名称',
        dataIndex: 'name'
      },
      {
        title: '分类',
        slots: { customRender: 'category' }
      },
      {
        title: '文档数',
        dataIndex: 'docCount'
      },
      {
        title: '阅读数',
        dataIndex: 'viewCount'
      },
      {
        title: '点赞数',
        dataIndex: 'voteCount'
      },
      {
        title: 'Action',
        key: 'action',
        slots: {customRender: 'action'}
      }
    ];

    /**
     * 数据查询
     **/
    const handleQuery = (params: any) => {
      loading.value = true;
      // 如果不清空现有数据，则编辑保存重新加载数据后，再点编辑，则列表显示的还是编辑前的数据
      ebooks.value = [];
      axios.get("/ebook/list", {
        params: {
          page: params.page,
          size: params.size,
          name: param.value.name
        }
      }).then((response) => {
        loading.value = false;
        const data = response.data;
        if(data.success) {
          ebooks.value = data.content.list;
          // 重置分页按钮
          pagination.value.current = params.page;
          pagination.value.total = data.content.total;
        }else {
          message.error(data.message);
        }
      });
    };

    /**
     * 表格点击页码时触发
     */
    const handleTableChange = (pagination: any) => {
      console.log("看看自带的分页参数都有啥：" + pagination);
      handleQuery({
        page: pagination.current,
        size: pagination.pageSize
      });
    };

    // -------- 表单 ---------
    /**
     * 数组，[100, 101]对应：前端开发 / Vue
     */
    const categoryIds = ref();
    const ebook = ref();
    const modalVisible = ref(false);
    const modalLoading = ref(false);

    const handleModalOk = () => {
      modalLoading.value = true;
      ebook.value.category1Id = categoryIds.value[0];
      ebook.value.category2Id = categoryIds.value[1];
      axios.post("/ebook/save", ebook.value).then((response) => {
        modalLoading.value = false;
        const data = response.data; // data = commonResp
        if (data.success) {
          modalVisible.value = false;
          // 重新加载列表
          handleQuery({
            page: pagination.value.current,
            size: pagination.value.pageSize,
          })
        }else {
          message.error(data.message);
        }
      })

      };

    /**
     * 编辑
     */
    const edit = (record : any) => {
      modalVisible.value = true;
      ebook.value = Tool.copy(record);
      // ebook.value.category1Id = level1.value.id;
      // ebook.value.category2Id = level1.value.child.id;
      categoryIds.value = [ebook.value.category1Id, ebook.value.category2Id];
    };

    /**
     * 删除
     */
    const handleDelete = (id: number) => {
      axios.delete("/ebook/delete/" + id).then((response) => {
        const data = response.data; // data = commonResp
        if (data.success) {
          // 重新加载列表
          handleQuery({
            page: pagination.value.current,
            size: pagination.value.pageSize,
          })
        }
      });
    }

    /**
     * 新增
     */
    const add = () => {
      modalVisible.value = true;
      ebook.value = {};
    };

    const level1 =  ref();
    let categorys: any;
    /**
     * 查询所有分类
     **/
    const handleQueryCategory = () => {
      loading.value = true;
      axios.get("/category/all").then((response) => {
        loading.value = false;
        const data = response.data;
        if (data.success) {
          categorys = data.content;
          console.log("原始数组：", categorys);

          level1.value = [];
          level1.value = Tool.array2Tree(categorys, 0);
          console.log("树形结构：", level1.value);
          // 加载完分类后，再加载电子书，否则如果分类树加载很慢，则电子书渲染会报错
          handleQuery({
            page: 1,
            size: pagination.value.pageSize,
          });
        } else {
          message.error(data.message);
        }
      });
    };

    // 电子书列表显示分类名称
    const getCategoryName = (cid: number) => {
      // console.log(cid)
      let result = "";

      if(categorys) {
        categorys.forEach((item: any) => {
          if (item.id === cid) {
            // return item.name; // 注意，这里直接return不起作用
            result = item.name;
          }
        });
      }
      return result;
    };

    onMounted(() => {
      handleQueryCategory();
    });

    return {
      param,
      ebooks,
      pagination,
      columns,
      loading,
      handleTableChange,
      getCategoryName,
      edit,
      add,
      ebook,
      modalVisible,
      modalLoading,
      handleModalOk,
      categoryIds,
      level1,
      handleDelete,
      handleQuery
    }
  }
});

</script>